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2050 looks like…

Discussion in 'Environmental Discussion' started by tochatihu, Aug 9, 2015.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Born in December 1949, one of my earliest memories is of a working, coal fired, steam locomotive. I wish the next generation well but have no illusions that it will be easy. I've seen too many examples (even in the mirror) of those who deny reality which reminds me of the old joke:

    A dentist and a doctor went lion hunting in Africa. But the local food led to a gastric problem and they had to duck behind a bush for relief. Just at that moment, a lion jumped out and started chasing them.

    The dentist said to the doctor, "I don't know why we are trying to run so hard. Man can not out run a lion."

    The doctor replied, "I'm only trying to out run you."

    Bob Wilson
     
  2. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    2050 looks like…
    ........The inside of a casket, probably. :)


    Divers always swim with a buddy and they always have a dive knife strapped to their leg..... :D
     
  3. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I always figured after being field-dressed for parts, the rest would go to 'a tank' in a medical school or added to the global CO{2} load. No need to waste a hole. However, I've occasionally thought by internment in high-mineral content, water grave, perhaps a gypsum grave, with an inscription,"Petrified Bob." Do one better than the mummies.

    Bob Wilson
     
  4. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    I actually wanted to be buried at sea...perhaps impulsed out of a torpedo tube....however (comma!!!) this was swiftly countermanded by CINCHOUSE. I've always believed that it was ridiculous to put preservatives into a corpse, which is placed into a box.....and sometimes depending on the cemetery, into a concrete vault. :rolleyes:
    I always thought it would be nice to provide some shrimp or worm a nice meal, and I've always credited the Muslims for being very sensible about dealing with the whole death thing, with the exception of their prohibiting deliberate cremation.

    After any pieces parts are salvaged by the medical community, I now intend to be interred at the nearest open national cemetery under a cross shaped white rock....or in my local church cemetery.
    Her pick, since I won't be there. ;)
     
  5. tochatihu

    tochatihu Senior Member

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  6. austingreen

    austingreen Senior Member

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    The problem with the Malthusians and neo Malthusians and other preachers of famine is not crying wolf, but chiken little. It isn't as if this time there will be a famine and no one will listen, it is that some go around listening or preaching it, either getting eaten by the fox, or being the fox and hurting those that are foolish enough to listen.

    10 Terrible Famines In History - Listverse
    When you look down the list of famines in the 19 th and 20th century, there certainly is weather, but there is a darker human component. Many died in the irish potato famine because england didn't want to help feed them and even blocked other countries from giving food aid. Stalin burned crops to have peasants fall in line, the Japanese blocked bengal from importing food from burna, starving them out, The chinese simply put crazy farming methods out to increase food and caused the most deaths in the great leap forward, and the north korean famine was caused by awful agricultural policies and an unwillingness to import food.

    neo malthusians often advocate misanthropic government policies that seem to bring about fatalities. The agricultural revolution happened with neo malthusians saying we should let india starve

    Look at how much food there is in the world today. Obesity is more of a problem in much of the world than starvation, and 1/3 of food is wasted, plenty to feed all of the hungry. There are logistic issues that we need to work on, but starvation today is mainly political. That includes malnutrition in wealthy countries like the US.

    The biggest risk of famine is politics not weather events. If we plan correctly, can't say if that thread is like past British ones which were awful, all the people whose governments support them should have food. Mono crops are a political risk, as are food for fuel.
     
    #26 austingreen, Aug 17, 2015
    Last edited: Aug 17, 2015
  7. tochatihu

    tochatihu Senior Member

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    I think global malnutrition stands at about 900 million and obesity 600, if so we may not have reached the situation described @26

    +++
    There is a new WAIS ice-dynamics model projection
    TC - Abstract - Century-scale simulations of the response of the West Antarctic Ice Sheet to a warming climate
    Which comes close to the 'hot spot' map I asked for earlier. They suggest 20 cm SLR therefrom by 2100, which also qualifies as more 'good news'.

    +++
    To reach 2050 in good order, massive ice dumps and food shortages need to be avoided. Great if food, energy and water supplies to the bottom billion could also be improved. Stronger CO2 and T controls would be nice, but maybe have lower ranks on the hair-ignition scale.

    35 year perspective (one human career, approx.). What really needs done? Make sensible plans, then see if politicians etc. would be willing to 'visit' sanity and rational discussion.
     
  8. tochatihu

    tochatihu Senior Member

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    Another way to look at Food 2050 is to linearly extend recent crop yields forward:

    Ray DK, Mueller ND, West PC, Foley JA (2013) Yield Trends Are Insufficient to Double Global Crop Production by 2050. PLoS ONE 8(6): e66428. doi:10.1371/journal.pone.0066428

    They cite other studies suggesting that food supply by 2050 needs to be increased by 60%–110%. This seemed a bit high to me so I took a simpler approach.

    Current population 7.3 billion
    2050 population 9 billion (other folks suggest so)
    New mouths = 1.7 billion
    Currently undernourished 1 billion (I chose from a range of estimates)

    Put those together, and food for 10 billion would seem to be a reasonable goal for 2050. 10/7.3 is a 37 % increase. This is less than the 60%–110% increase that Ray et al. cite. Your estimate may vary.

    I found their Table 1 hard to work with, and instead used their Fig. 1. Current production rates (tons/hectare), linear extrapolations to 2050, and the % increase for each crop:

    Maize 5.1, 8.5, 66%
    Rice 4.3, 5.9, 37%
    Wheat 3.0, 4.0, 33%
    Soy 2.5, 3.9, 56%

    Three crops achieve my +37% goal, with wheat falling slightly short. Thus my conclusion differs from theirs, simply because I used a lower goal for 2050. If there is a wheat ‘shortfall’, then canny farmers would change some maize or soy fields to that crop. They have tractors to pay for.

    Linear extrapolations (by Ray or me) are not the most nuanced analyses out there, and I encourage readers to look into the ‘yield gap’ literature.

    How does this relate to the previous study on food shocks (from local climate issues etc.)? Reduced supply in some region would have to be compensated by better-than average improvements somewhere else. It is very hard to predict how that will play out. But look again at Ray’s Fig. 1. Dots since 1960 seem nicely aligned to linear growth, except for maize. Except for maize, all the wild stuff you may have heard about previous recent crop failures may be just a bit (as AustinGreen would say) Malthusian. Maize has both the most variable recent history, and the fastest recent growth. The wild one in this group for sure.

    A good reason not to look earlier than 1960 is that was essentially the start of the Green Revolution. Crop varieties were ‘tuned’ to different conditions of water and fertilizer supply. I suspect there were larger interannual variations, even assuming that global production data are available.

    So, I suggest you all abandon pejorative terms (Malthusian, denier, hoax, BS, etc.) and think about realistic futures. 2050 is only far away for old geezers who will miss it. For the rest, it is coming right up.
     
  9. tochatihu

    tochatihu Senior Member

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    I welcome suggestions on how to discuss potable water supply over the next 35 years. The literature I have seen is unsatisfying.

    Two (or 2.5) billion people are still getting primary energy from burning things (wood, dung) indoors. Exposure to <2.5 micron particles makes this very undesirable for the future. It may be health-adverse to a similar extent that many urban areas have PM 2.5 'off the charts', but different ways are needed to address.

    Those are the last two we might address here in the 2050 thread. Unless anyone else has ideas...
     
  10. austingreen

    austingreen Senior Member

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    UN had 805 million "hungry" in 2012, about half of those suffer from malnutrion that is serious, but yes it should be 0. Some especially in sudan has been reduced since that report, but it still is a problem. There is plenty of food to feed these people, its a distribution and government politics problem. 1.8 billion are over weight, of which 600 million are obese. If we distributed the extra food from those 1.8 billion to the 800 million, well you can see there is plenty of food. About 1/3 of food is wasted, that is grown and gets thrown away or sits around until it is spoiled. Food security was part of a conference I attended, and I was shocked at how much we waste.

    +1
    Nice
    When a bad government causes famine or makes moves to sarve people, most recently sudan, north korea, and somalia, there is not much we can do.
    Our experience in the last 300 years is that both population growth and food production are extremely non-linear. Sure linear is a good place to start, but why not look historically.
    Population in 1900 was about 1.7 B, in 2000 6B, today 7.36 (okay check the link, it updates for the today you read this.
    World Population Clock: 7.3 Billion People (2015) - Worldometers


    Don't think its a goal, but yes its a good guess for 10 billion. Not sure why we would need 110% of the food, unless we want weight to increase, you know from 1.8 B overweight today to maybe 7 billion overweight in 2050. That seems like a poor goal.
    Well yes, we should have a richer population, people will grow what the governent or people tell them will sell. Hopefully the US government will stop with the massive corn push. That is a risk.

    Yes, I would say historically yields have increased much faster, as they are exponential, not linear. The mechanism here has always been technologies, and with the internet and faster computers we can through selection (either artificial or genetic modification) get more drought or mold or pest resistance. Its not all good news. With the extra yields the world will demand more meat, which will push for more agricultural land. Yield per acre of chicken or pork or beef is much lower than beans or rice.

    I see a steady trend -> irrigation, fertilizer, manufactured fertilizer (haber process solved the manure shortage problem, can be made by wind water, nitrogen, and carbon dioxide), along with better artificial selection and gmo. Better weather prediction should improve yields and some tech I don't know yet. gmo is in its infancy.

    I would not assume selection is played out. We did not know before each agricultural revolution that it was going to happen.

    I apologize if the Malthusian term offended you. I do belive that we need to guard against some politics based on poor science. Many still belive that food will only increase linearly by more acres in spite of this idea being so wrong over the last couple of centuries. perhaps climate change will help or will hurt this technological increase in yield, at this point we don't know. I just would beware of thoughts that we can't feed 10 billion people when there is so much food today. The problem is in distribution and governments.
     
  11. tochatihu

    tochatihu Senior Member

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    Long crop productivities certainly had early exponential-like phases. I think it's entirely clear from plant physiology that the underlying curve logistic. Sigmoidal.

    probably the least understood pattern of all, but hugely common. With 'linear', 'exponential', and finally linear again, it has something for everyone to like.
     
  12. tochatihu

    tochatihu Senior Member

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    2050 temperature may be 0.7 oC above current. A graph may be of use to visualize the whole picture. For the instrumental surface T records I use GISS (preferred by AustinGreen) and HADCRUT4 (presented by mojo). The others that I know of are quite similar. Part of the difference between these two is their different baseline periods from which to calculate anomalies. GISS uses 1951-1980 while HADCRUT4 uses 1961-1990.

    To calculate 10-year averages I started with the most recent year of complete data (2014) and worked backwards. So the latest symbol for each covers 2005-2014.

    It turns out that my 2050 expectation is at the low end of IPCC CO2 e projection scenarios, though I did not plan it so. I found 3 others from which I could extract predictions. If anyone feels I got those wrong, or has others to add, let us discuss.

    In particular I did not graph any strong cooling prediction, such as have been discussed recently. Those could be added, but if we are talking about -5 oC like IceAgeNow, the scale of the graph would need to be expanded.

    To reiterate, while CO2 is on the way up, it absorbs IR as logarithm so we can’t really ‘give it more’ as direct forcing. Positive feedbacks may kick in to get us into IPCC territory, but water vapor does not look like a strong candidate. Its recent decadal increases have been sluggish at most.

    On the other hand, the ocean might do another pulldown and put us into S-E-T territory. I don’t expect this, but I only know the future slightly better than ya’ll:rolleyes: .

    Large drops in T would come as a great surprise, except to those who confidently expect them to occur.

    decadal T to 2050.jpg
     
  13. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I appreciate the effort but decided to use:
    • annual period - this lets us see the effect for forcing functions like solar cycle, El Nino/La Nina and volcanic events. These 'noise' events are interesting yet widely spaced so depending upon where decade boundaries fall, different plots can be generated from the same data.
    • Gaussian weight average - as pointed out before, it takes out most of the 'noise.'
    • Berkley land - this record traces back to the beginning of the modern instrument era, ~1850, and have been subject to improvements over time. An open effort, it has credibility.
      • Investigating use of sea level to provide ocean mean surface temperature.
    I am bothered that short-term forcing functions are not well qualified. El Nino/La Nina, the surface patterns are easily detectable BUT "massive" "greatest" "minor", these are not quantitative values. The same exists for volcanoes, we can easily see them but the particulates and gasses are seldom quantified for each event until well after. Then there are the sun-spot activity papers/presentations that was badly "announced."

    We are approaching the same problem with different goals. I'm interested in near-time metrics and projects to 2050 sort of fall out. But I'm also interested in every year in between including looking at the poorly predicted, forcing functions.

    Bob Wilson
     
  14. austingreen

    austingreen Senior Member

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    Bob,. the independant functions are solar radiation and gasses, which includes human fossil burn and volcano.

    ENSO, AMO, ice melt, etc are things to be modeled from those imputs. and are not forcing functions but part of natural variation. If you go down to a 1 year time period you need to model these well. It is difficult even after the fact to remove ENSO from the temperature record, which is why a smoothing function is often used. For me an 11 year moving average is simple computationally and does correspond to half a solar cycle, so there is a good chance that physically it is bluing most of the natural variation. Ten years is almost as good. If you pick single years you better be able to explain why you get so big of an error, and why the low recent warming is going on, things that are not necessary with a moving average, or a good filter that is chosen to remove variation.

    Tochatihu, for me NCDC not GISS is the best one to model against, but GISS is very close and good too. HADCRUT is a little problematic as the methodology is not open, which means it may vary based on this unknown choice that models have no way of taking into account.
     
  15. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I agree that calling El Nino/La Nina a forcing function is poor practice. Just I've seen at least one paper treat them as forcing and not a following or dependent function. For example, the dip in sea level when the Icelandic volcano occurred was by tagged by one author as being a result of a La Nina ... a La Nina others have called 'minor'. I am really not happy with the El Nino/La Nina 'metrics' or rather their absence.

    The real problem is the mechanics of El Nino/La Nina (and other ocean effects) versus climate forcing functions are still poorly understood. If you need more examples, 'mojo' once posted a link to some nonsense about AMO about to freeze out Europe.

    I'm also unhappy with the current data on volcanic activities. We need real-time, gas and ash data but I don't think anyone is really looking at collecting and reporting this data. As I have time, I'll survey the "A-train" satellites to see if they have any better gas concentration metrics. In particular, I'm interested in sulfur compounds. But dust may be a 'bridge too far' as the magna are not uniform and all dust particles are not the same.

    Later,
    Bob Wilson
     
  16. austingreen

    austingreen Senior Member

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    ENSO is modeled poorly in the global climate models. Some theories have it related to solar radiation, and thus the solar cycle. I have hope that we will be able to predict the solar cycle (independent variable) and then get ENSO modeled if that is what is lacking. Volcanos while part of natural variation are not well predicted, so we can consider this also a independent variable. I doubt ENSO is dependant on that, but then again it is not well modeled. I think the trick is for the climate models to be able to take the imput of volcanic, solar cycle, and major ghg sulfur dioxide, and particulates. If when actual are used I hope that the models reflect what happened. Once that happens we can worry more about the predictions being accurate.

    There is a theory that the artic ice melt will change atlantic ocean circulation and AMO. If this happens the UK will likely get colder. This may cause a pause in warming.
    http://www.sciencedaily.com/releases/2010/11/101103141541.htm

    I believe NASA and NOAA are trying to get instruments to collect this data. NASA has had trouble lately getting its observation satellites up, but have some planes to aid study.
    News | NASA Sends Unmanned Aircraft to Study Volcanic Plume
     
  17. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I have seen a distinct cold spot in the North Atlantic where normally I'd expect to see the Gulf Stream. BUT I have been looking at the Unisys SST anomalies and not the raw temperature data:
    Of course, how could the English tell if the weather is cold and wet from being cold and wet.

    Bob Wilson
     
  18. austingreen

    austingreen Senior Member

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    Far off topic, but if theories of reversing atlantic circulation happen (maybe in 100 years) UK will have a shorter growing season and will need to change crops. In the French wine country summers will be wetter, and wine will taste different. These are regional not global things. Other places will have longer growing seasons and be better for wine grapes. As I see it all the climate change scenarios for England are bad, but some may be good for the US and Canada. Winners and losers.
     
  19. tochatihu

    tochatihu Senior Member

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    There are real time global atmospheric opacity products. Not specifically ash.

    I agree with 11-year, suggested it before. But not exactly that. Instead, the averaging intervals are based on actual sunspot minima. These vary somewhat in length.

    This will become practical in 3 years or so when current cycle bottoms out. Do the calculation now will like underestimate T of current cycle. All the earlier cycles could be done, but the process of pinpointing solar minima is tedious and I haven't felt inspired.

    Yes, 'annual' lets one look at forcings. But there is thermal inertia (time lags) in the system, diffeent boxes with different tau values. Empirical modeling will always be somewhat off because of that, and I don't think you'll know how much.

    NCDC not GISS? I remembered wrong then.

    If we get even to the middle of IPCC T range by 2050, it constitutes so much acceleration that people could scarcely not notice.
     
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